Manoj Gupta e0f4b3ec5f gdb: Fix building with latest libc++ ...

Latest libc++[1] causes transitive include to <locale> when
<mutex> or <thread> header is included. This causes
gdb to not build[2] since <locale> defines isupper/islower etc.
functions that are explicitly macroed-out in safe-ctype.h to
prevent their use.
Use the suggestion from libc++ to include <locale> internally when
building in C++ mode to avoid build errors.
Use safe-gdb-ctype.h as the include instead of "safe-ctype.h"
to keep this isolated to gdb since rest of binutils
does not seem to use much C++.

[1]: https://reviews.llvm.org/D144331
[2]: https://issuetracker.google.com/issues/277967395

2023-04-29 00:35:11 -07:00

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